12155123 has 2 divisors, whose sum is σ = 12155124. Its totient is φ = 12155122.

The previous prime is 12155081. The next prime is 12155137. The reversal of 12155123 is 32155121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (32155121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12155123 - 2¹⁶ = 12089587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12155095 and 12155104.

It is not a weakly prime, because it can be changed into another prime (12155173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077561 + 6077562.

It is an arithmetic number, because the mean of its divisors is an integer number (6077562).

Almost surely, 2^12155123 is an apocalyptic number.

12155123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155123 is an equidigital number, since it uses as much as digits as its factorization.

12155123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 20.

The square root of 12155123 is about 3486.4197968690. The cubic root of 12155123 is about 229.9251363155.

The spelling of 12155123 in words is "twelve million, one hundred fifty-five thousand, one hundred twenty-three".